CVE-2026-59890: setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages

Q: How do I fix CVE-2026-59890?

setuptools: upgrade to 83.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-59890 being exploited?

CVE-2026-59890 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-59890 affect?

CVE-2026-59890 affects setuptools. Severity is medium (CVSS 6.1). setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. Prior to 83.0.0, FileList applied MANIFEST.in exclude, global-exclude, recursive-exclude, and prune directives by matching compil

Q: How urgent is CVE-2026-59890?

Priority 35/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2026-59890 is a medium-severity flaw (CVSS 6.1) affecting setuptools. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. Prior to 83.0.0, FileList applied MANIFEST.in exclude, global-exclude, recursive-exclude, and prune directives by matching compiled glob patterns against on-disk file names without Unicode normalization, so on macOS APFS or HFS+ an NFD file name could bypass an NFC exclusion rule and be packed into a source distribution. This issue is fi

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-176, CWE-697
Published	2026-07-08
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: python

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 17:17 UTCPublished CVE record published
2026-10-25 17:10 UTCUpdated Record last modified

python setuptools UPGRADE

Affected: < 83.0.0

Fixed in: 83.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy setuptools || rpm -q setuptools || setuptools --version

2. UPGRADE to 83.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade setuptools

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade setuptools

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59890?

setuptools: upgrade to 83.0.0. Exact commands for each OS are on this page.

Is CVE-2026-59890 being exploited?

CVE-2026-59890 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59890 affect?

CVE-2026-59890 affects setuptools. Severity is medium (CVSS 6.1). setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. Prior to 83.0.0, FileList applied MANIFEST.in exclude, global-exclude, recursive-exclude, and prune directives by matching compil

How urgent is CVE-2026-59890?

Priority 35/100. Public exploit reference

Software pages

Python vulnerabilities · macOS vulnerabilities

References

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